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A. F. ABIGT.

MOLDING MACHINE.

APPLICATION HLED APR.7,1920. 1,376,129. Patented Apr. 26, 1921.

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MOLDING MACHINE.

APPLICATION FILED APK. 7 1920.

1,376,129. ,Patented Apr. 26,1921.

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una lilla wimwtoz A. F. Amst. MOLDING IVIACHINE. APPLICATION FILED APRJ 1920.

1,376,129.- Pmna Apr. 26, 1921.

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ARTHUR F. ABGT, OF XNDIANAPOLIS, INDIANA.

MOLBING-MACHXNE.

Speccaton of Letters Patent.

Patented Apr. 26, 1921.

Application filed. April 7, 1920. Serial No. 371,793.

T 0 all whom 'it may concern:

Be it known that l, ARTHUR F. Amor, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Molding-Machine, of which the following is a specification.

The object of my invention is to produce a machine by which the formation of sand molds may be materially facilitated.

The accompanying drawings illustrate an embodiment of my invention. Figure l 1s a front elevation in partial vertical section; F 2 a section on line 2 2 of Fig. l; Fig. 3 a fragmentary perspective of the match-plate holder; Fig. 4 a fragmentary detail, in partial section, of the air-valves and adjacent piping; Fig. 5 an elevation of one of the 'coupling plates; Fig. 6 a plan of my improved flask pin and adjacent parts; Fig. 7 a vertical section on line 7 7 of Fig. 6; Fig. 8 a perspective of the cope member of my improved flask-pin; Fig. 9 a perspective of the match-plate member to coperate with the flask members; and Fig. 10 a perspective of the drag member.

In the drawings, 20 indicates a suitable supporting frame having a pair of horizontal bearings 21, 21 in which are journaled the trunnions 22 of a swinging frame 23 which is temporarily locked in either of its vertical positions by a latch 24 arranged to engage either one of pins 25, 25.

Frame 23 comprises two air-cylinders 26, 26 in each of which is mounted a piston 27., each carrying a piston rod 28. The rods 23 carrying, at each end of the cylinders, a cross head 29 provided with a table 30 adapted to engage the usual bottom board 3l. vcommonly used in conjunction with the flask members 32, 32.

In order to insure uniformity of action of the two pistons, I journal a shaft 33`on one of heads 29 and this shaft carries pinions 34 which mesh with stationary racks 35 on frame Heads 29 are adjustable lengthwise of the piston rods and are held at desired points by any suitable means such as set screws 36.

The pattern plate 40 in general of usual form, must be supported between the two cross-heads 29 in frame 23` and for this purpose. I have provided laterally projected arms 4l having guides 42 adapted to receive and guide the ends of retaining bars 43 which are provided with grooves 44 formed to receive the longitudinal edges 0f the match plate 40.

Bars 43 are held in any desired position by screws 45 so that match plates of various sizes may be used in the machine.

Arranged axially of each trunnion 22 is an air passage 50 which leads to one end of the adjacent cylinder 2'?. A passage 5l is arranged eccentrically in each trunnion and this passage leads to the opposite end of the adjacent cylinder. Coperating with the outer end of each trunnion 22 is a coupling plate provided with a passage 50', which always registers with adjacent passage 50, and an arc-shaped passage 5l', which always registers with passage 5l. Passages 50 are connected by pipes 50 and passages 51 are connected by pipes 5l.n A main air supply pipe 52 is connected, through two-way valves 50 and 51', with pipes 50 and 51, as shown in Fig. 4, the arrangement being such that, by proper manipulation of the valves, pistons 27 may be controlled in their movement in their cylinders.

It is, of course, exceedingly important, that the flasks be accurately held and guided in their separation from the match plate and their assembly after the mold is completed. For this purpose, ll have provided the improved construction shown in detail in Figs. 6 t0 10.

Firected upon the pattern plate, at each end of the pattern space, and preferably in the drag side, is a guide post which l prefer to make V-shaped in horizontal section, although this is not necessary. The cope 'flask member 32 carries a guide member'6l, formed to coperate with post 60, and this member 61 is preferably carried by a bracket 62. perforated at 63 to permit the insertion of post 60, and adjustable laterally of post 60 by screws 64 and 65 which are carried by a holding bracket 66 attached to the cope flask 32 and perforated at 67 for the free passage of post 60 and the drag pin 68, which is secured, in the usual manner, to the drag flask member 32. The pattern plate 40 is perforated at 69 at the foot of each post 60 to permit the accurately guided passage of a pin 68. The pin 68 is formed to have a straight line sliding engagement with member 61, and this member' (3l has a strai;,ht-line sliding engagement with post 60.

It will be noted that, by the above-described arrangement, the two flask members, even while associated with the match plate, are guided in the' relationship to each other, not only by the sliding engagement of pins 68 with the match plate, but also by the cooperation of pins 68 with the adjacent members 61 (with which they are to cooperate when the molds are finally assembled for pouring) and consequently the copes and drags of the finished molds are sure to fit accurately.

Starting with the machine empty and frame 23 in one of its vertical positions, the operation will be as follows: By proper manipulation of valves 50 and 51', pistons 27 will be moved upwardly and there held by the air pressure in the lower ends of the cylinders. A match plate l-.O will be then inserted in its holder, drag face up, and a drag flask with its pins 68 placed in position with the pins 68 accurately fitting openings G9. Sand will then be placed in the drag-flask, bottom board 31 placed thereon, and the upper cross head brOught down so as to properly compress the sand. .F rame Q3 is then inverted; a cope flask placed in position with its fittings 61-66 in sliding engagement with posts (S0 of the match plate and pins GS of the drag flask, and the operation repeated. As the pistons 27 are manipulated this time, the completed drag drops away from the pattern plate, pins 68 sliding freely, but accurately, against members 61 and through perforations 69, while the cope is hold accurately in place by the enga ,agement of members 61 with the posts 60 of the match plate. The operator soon learns to manipulate valves 50 and 51', so that the lower mold is dropped away from the pattern without injury. lhen the downward movement of the piston is completed, the lower mold is carried away; the frame 23 is reverted, and the operation repeated, completed flask being presented for withdrawal each time a new flask is being completed.

l claim as my invention:

l. Vln a molding machine, an invertible frame provided with an open-frame matchplate holder, means by which flasks may be accurately associated either simultaneously or independently with ythe appropriate face of the match plate and with each other, two fl ask-supporting sand-compressing members carried by the swinging frame at opposite sides of the match plato holder, and means by which said members may be moved t-oward and from the plane of the match plate.

2. In a molding machine, an invertible frame provided with an open-frame matchplate holder, means by which flasks may be accurately associated either simultaneously or independently with the appropriate face of the match plate and with each other, two flask-supporting sand-coinpressing members cai ied by the swinging frame at opposite sides of the match plate holder, pistons and associated cylinders controlling; said members, and fluid pressure controlling means associated therewith.

3. In molding machine, an invertible frame provided with an open-frame matchplate holder, means by which flasks may be accurately associated either simultaneously or independently with the appropriate face of the match plate and with each other, means by which sand in the upper flask may ie compressed, and means for supporting and lowering the lower flask away from the match plate, simultaneously with the movement of the pressing means to active position.

f1. ln a molding machine, an invertible frame having a pattern )late holder, a pattern plate supported thereby and perforated to receive and guide flask pins, guide posts carried by one face of the pattern plate adjacent said perforations, and two flasks for cooperation with the opposite faces of the pattern plate, one flask being provided with guiding member formed to sliding-ly engage said posts adjacent the perforation, and the other flask being provided with a guiding` member formed to slidingly engage the pattern plate perforation and the guiding member of the other flask.

5. In a molding machine, an invertible frame having a pattern plate holder, a pattern plate supported thereby and perforated to receive and guide flask pins, guide posts by one face of the pattern plate cent said perforations, and two flasks for cooperation with the opposite faces of tbe pattern plate, one flask beingr provided with guiding member formed to slidingly enpnee said pests, and the other flask being provided with guiding member formed to slidingly engage the pattern plate perforation and the guiding member of the other flask.

6. The combination with a match plate, of a guide post carried by said plate and provided with two guide surfaces formed to determine both lateral and longitudinal rela-- tive positions, a flask member carrying a pin adapted to cooperate with one of the post guide surfaces, a second flask carrying 'a guide having outer and inner guide surfaces adapted to coperate respectively with the pin of the other flask member and the other guide surface of the match plate post, and means for adjusting said guide piece toward and from the flask.

7. The combination with a match plate, of

a guide post carried by said plate and provided with two guide surfaces formed` to determine both lateral and longitudinal relative positions7 a flask member carrying a pin adapted to cooperate with one of the post guide surfaces, and a second ask carrying a guide having outer and inner guide surfaces adapted t0 coperate respectively with the pin of the other flask member and the other guide surface of the match plate post.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 2nd clay of April, A. D. one thousand nine hundred and twenty.

' ARTHUR F. ABIGT. 

